SEARCH Articles Figures Tables 1,2,4,5-Tetrazine 1+4]cycloaddition 1,2,4,5-Tetrazine reactions 3.6- Disubstituted 1,2,4,5-tetrazines 3.6- Disubstituted 1,2,4,5-tetrazines, reaction Tetrazines Tetrazines cycloaddition reactions